Difference between revisions of "JEF meeting, September 1, 2017"
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=Agenda= | =Agenda= | ||
* CompCAL/FCAL II strategy | * CompCAL/FCAL II strategy | ||
+ | |||
+ | =Minutes= | ||
+ | Attendees: L. Gan, Z. Papandreou, A. Somov., S. Taylor | ||
+ | #We discussed various options for acquiring the lead tungstate crystals needed for the JEF experiment: | ||
+ | # Use recycled crystals from the CMS endcap | ||
+ | ## These crystals are not rectangular, so it probably makes sense to replace the entire FCAL with something constructed from these crystals if we can get them. | ||
+ | ## Major costs would come from electronics and support structure | ||
+ | ## Time frame might be on the order of ~5 years? | ||
+ | ## The crystals have radiation damage. | ||
+ | #Recycle HyCAL crystals. | ||
+ | ## Would require unstacking and adding magnetic shielding | ||
+ | ## Other experiments have plans to use the HyCAL as is (although these experiments have yet to be approved by the PAC) | ||
+ | ## We considered whether it was feasible to modify the HyCAL to incrementally add more lead tungstate crystals and keep it as a unit that could be moved from Hall to Hall in the lab. | ||
+ | ## The final option would be to start fresh and buy our own set of ~2500 crystals | ||
+ | #Hall C has bought (plans to buy?) a set of crystals -- perhaps we can use them after their experimental program is done with them? |
Revision as of 14:20, 1 September 2017
Meeting time and location= 11:00 EST (JLab time) CC-f227
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Agenda
- CompCAL/FCAL II strategy
Minutes
Attendees: L. Gan, Z. Papandreou, A. Somov., S. Taylor
- We discussed various options for acquiring the lead tungstate crystals needed for the JEF experiment:
- Use recycled crystals from the CMS endcap
- These crystals are not rectangular, so it probably makes sense to replace the entire FCAL with something constructed from these crystals if we can get them.
- Major costs would come from electronics and support structure
- Time frame might be on the order of ~5 years?
- The crystals have radiation damage.
- Recycle HyCAL crystals.
- Would require unstacking and adding magnetic shielding
- Other experiments have plans to use the HyCAL as is (although these experiments have yet to be approved by the PAC)
- We considered whether it was feasible to modify the HyCAL to incrementally add more lead tungstate crystals and keep it as a unit that could be moved from Hall to Hall in the lab.
- The final option would be to start fresh and buy our own set of ~2500 crystals
- Hall C has bought (plans to buy?) a set of crystals -- perhaps we can use them after their experimental program is done with them?